<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
       #div {
            float: left;
            border: 1px solid #aabbcc;
            width: 100px;
            height: 100px;
        }
    </style>
</head>
<body>
<div id="div1"> div1</div>
<div id="div2"> div2</div>
<div id="div3"> div3</div>

</body>
</html>